Malicious PDF — malware analysis report

Static analysis result for SHA-256 94125d5bf8e56161…

MALICIOUS

PDF

72.0 KB Created: 2021-09-02 20:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0df7c9d0046717bf2d8c3ca28d1f553 SHA-1: a17c0a4f7303904f29a36e78d3e1ef820b9aef4d SHA-256: 94125d5bf8e56161fcef4306cc048b2c10df9034a28a7e81b8b7609f187711c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. The primary goal appears to be directing users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0f94b7844---banorinad.pdf In PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/asckihsj25d9nllvugc542r3ek/64639061860.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/rgbugg5ghqtjrcd03q01l8djr2/xuvozok.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608380507b36e---14746722229.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079437226605---kapogazurinopi.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/70695993880.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/ruwozixizonev.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/vafurov.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/mapilupekixekuzixako.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a79b1dacd---bebejos.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/42832175335.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/wifosutubunujowimojatude.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/afaeaca71fc4c49e238c31788b1aca49/godanokufixupepi.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/162216047960a54f34ad326.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/winekizodagadaxelesumaken.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/1df42c22ba84b4734e8e45f8d6bd07d0/10302526526.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/kotolemerebegakulijon.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610470db28b79---94012069855.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/loxopulomuvigaperevumenug.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/regawiforoweworevilijol.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/pegajozewedatekezoja.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/12566795548.pdfIn PDF document text
    • http://industrialdevices.in/uploads/dasetu.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/rivebefedunipetod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=reformas+laborales+en+colombia+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD781 18316 bytes
SHA-256: 38a017953975f9331b417f616e348cb31e75bf0adcfe622e159151f6a8e8b366
font_01_sfnt_off00010601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10601 10868 bytes
SHA-256: a55a4512b7786b0e919e4765d442817858d35374cb11d111b04f0bcced1b3f4d

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